Help please 2y-5x=-1, x=2y+5

Answers

Answer 1

Answer: $\left\{\begin{array}{ccc}2y-5x=-1\nx=2y+5\end{array}\right\n\nsubstitute\n\n2y-5(2y+5)=-1\n2y-10y-25=-1\n-8y=-1+25\n-8y=24\ \ \ \ /:(-8)\ny=-3\n\nx=2\cdot(-3)+5=-6+5=-1\n\nSolution:x=-1;\ y=-3$

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A number increased by 10

Answers

Answer:

im pretty sure we need the previous value

Answer:

Step-by-step explanation:

just got it right on plato

A race car moving along a circular track has a centripetal acceleration of 12 m/s. Ifthe distance between the car and the center of the track is 40 m, what is the speed
of the car?

Answers

Answer:

The speed of the car is 21.91 m/s

Step-by-step explanation:

Centripetal Acceleration

It's the acceleration experienced by an object in a uniform circular motion.

It always points toward the center of rotation and is perpendicular to the linear velocity v.

The magnitude of the centripetal acceleration is:

$\displaystyle a_c=(v^2)/(r)$

Where r is the radius of rotation.

The race car has a centripetal acceleration of $a_c=12 m/s^2$ and the radius of rotation is r=40 m.

We can calculate the speed of the car by solving the above equation for v:

$v=√(a_c\cdot r)$

$v=√(12\cdot 40)$

$v=√(480)$

$v=21.91\ m/s$

The speed of the car is 21.91 m/s

1.(02.01)
Solve -4(x + 1) – 3 = -3(x – 4). (1 point)
O
-19
19
2.

Answers

Answer:

x = -19

Step-by-step explanation:

hope this help :)

Answer:

$\boxed {x = -19}$

Step-by-step explanation:

Solve for the value of $x$ :

$-4(x + 1) - 3 = -3(x - 4)$

-Use Distributive Property to both sides of the equation:

$-4(x + 1) - 3 = -3(x - 4)$

$-4x - 4 - 3 = -3x + 12$

-Combine like terms:

$-4x - 4 - 3 = -3x + 12$

$-4x - 7 = -3x + 12$

-Take $-3x$ and add it to $-4x$ :

$-4x - 7 + 3x = -3x + 3x + 12$

$-x - 7 = 12$

-Add both sides by $7$ :

$-x - 7 + 7 = 12 + 7$

$-x = 19$

-To make the variable $x$ positive, divide both sides by $-1$ :

$(-x)/(-1) = (19)/(-1)$

$\boxed {x = -19}$

Therefore, the value of $x$ is $-19$ .

At the newest animated movie, for every 99 9 children, there are 44 4 adults. There are a total of 3939 39 children and adults at the movie. How many children are at the movie?

Answers

Answer:

27 children.

Step-by-step explanation:

We are told that at the newest animated movie, for every 9 children, there are 4 adults. There are a total of 39 children and adults at the movie.

We can see that number of children is proportional to number of adults. So we will use proportions to solve for number of children at the movie.

$\frac{\text{Number of children}}{\text{Number of children + Adults}}=(9)/(4+9)$

$\frac{\text{Number of children}}{\text{Number of children + Adults}}=(9)/(13)$

Let us substitute number of children and adults in our proportion.

$\frac{\text{Number of children}}{39}=(9)/(13)$

Multiply both side of equation by 39.

$39*\frac{\text{Number of children}}{39}=39*(9)/(13)$

$\text{Number of children}=39*(9)/(13)$

$\text{Number of children}=3*9$

$\text{Number of children}=27$

Therefore, 27 children are at the movie.

Height = 5cm
Base = 12cm

Answers

The answer would be 60 because you do based times height which equals the area

What are you trying to find? Area or perimeter?

A bakery's production is modeled by function f(x), where f(x) is the number of donuts made in a day and x is the number of bags of flour needed. Choose the ordered pair that represents a possible domain and range of the function.(−1, 15)
(5, 92.75)
(10, 100)
(−5, 110.5)

Answers

it can't be A or D because they have negatives. you can't have negative donuts. you can't have 92.75 donuts therefore it's C

Final answer:

The domain and range of the function represent the possible inputs and outputs. The given ordered pairs are analyzed to determine the possible domain and range.

Explanation:

The domain and range of a function represent the possible inputs and outputs of that function. In this case, the function represents the number of donuts made in a day based on the number of bags of flour needed. The domain of the function would be the possible values for x, which is the number of bags of flour. The range of the function would be the possible values for f(x), which is the number of donuts made.

Looking at the given ordered pairs:

(-1, 15): The number of bags of flour cannot be negative, so this is not a possible domain. The range value of 15 is possible for the number of donuts made.
(5, 92.75): This is a possible ordered pair for the domain and range. The number of bags of flour is 5, and the number of donuts made is 92.75.
(10, 100): This is a possible ordered pair for the domain and range. The number of bags of flour is 10, and the number of donuts made is 100.
(-5, 110.5): The number of bags of flour cannot be negative, so this is not a possible domain. The range value of 110.5 is possible for the number of donuts made.

Based on the given options, the ordered pairs (5, 92.75) and (10, 100) represent possible domains and ranges for the function.

Learn more about Domain and Range here:

brainly.com/question/30133157

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